資源限定
軟限制：可以超出的限制，但僅能超出一定時長
硬限制：絕對不能超出的限制
ulimit：只能修改軟限制
-n [N]：顯示或限制能打開的最大的文件句柄數，
-u [N]：所能夠打開的最大進程數
如果修改硬限制
/etc/security/limits.conf,擴展配置etc/security/limits.d/*.conf
對誰進行限定 類型 要限定的選項 值
apache hard nofile65535
apache hard nproc30000
ab工具的初步使用
-c 模擬的併發數
-n 模擬的總請求數
一般併發數應該小於等於請求數
ulimit -n 3000
ab -c 100 -n 10000 http://192.168.130.65/pma/index.php
啓動加速前
[root@localhost ~]# ab -c 10 -n 1000 http://192.168.130.65/pma/index.php
This is ApacheBench, Version 2.3 <$Revision: 1843412 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 192.168.130.65 (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests
Server Software: Apache/2.4.37
Server Hostname: 192.168.130.65
Server Port: 80
Document Path: /pma/index.php
Document Length: 14323 bytes
Concurrency Level: 10
Time taken for tests: 19.420 seconds
Complete requests: 1000
Failed requests: 947
(Connect: 0, Receive: 0, Length: 947, Exceptions: 0)
Total transferred: 15841640 bytes
HTML transferred: 14321640 bytes
Requests per second: 51.49 [#/sec] (mean)
Time per request: 194.201 [ms] (mean)
Time per request: 19.420 [ms] (mean, across all concurrent requests)
Transfer rate: 796.62 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.2 0 7
Processing: 105 192 93.3 153 786
Waiting: 98 185 92.7 145 778
Total: 105 192 93.3 153 786
Percentage of the requests served within a certain time (ms)
50% 153
66% 193
75% 227
80% 262
90% 337
95% 373
98% 437
99% 522
100% 786 (longest request)
[root@localhost ~]#
1、安裝
tar xf xcache-3.2.0.tar.gz
cd xcache-3.2.0
/usr/local/php/bin/phpize
./configure --enable-xcache --with-php-config=/usr/local/php/bin/php-config
make && make install
安裝結束時，會出現類似如下行：
Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-zts-20131226/
2、編輯php.ini，整合php和xcache：
mkdir /etc/php.d
cp xcache.ini /etc/php.d
vim /etc/php.d/xcache.ini
extension = /usr/local/php/lib/php/extensions/no-debug-zts-20131226/xcache.so
啓動加速後
[root@localhost xcache-3.2.0]# ab -c 10 -n 1000 http://192.168.130.65/pma/index.php
This is ApacheBench, Version 2.3 <$Revision: 1843412 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 192.168.130.65 (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests
Server Software: Apache/2.4.37
Server Hostname: 192.168.130.65
Server Port: 80
Document Path: /pma/index.php
Document Length: 14322 bytes
Concurrency Level: 10
Time taken for tests: 6.322 seconds
Complete requests: 1000
Failed requests: 871
(Connect: 0, Receive: 0, Length: 871, Exceptions: 0)
Total transferred: 15842084 bytes
HTML transferred: 14322084 bytes
Requests per second: 158.17 [#/sec] (mean)
Time per request: 63.225 [ms] (mean)
Time per request: 6.322 [ms] (mean, across all concurrent requests)
Transfer rate: 2446.95 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.1 0 0
Processing: 36 63 55.1 50 670
Waiting: 34 60 54.8 47 670
Total: 36 63 55.1 50 670
Percentage of the requests served within a certain time (ms)
50% 50
66% 56
75% 62
80% 65
90% 78
95% 98
98% 229
99% 426
100% 670 (longest request)
[root@localhost xcache-3.2.0]#